HELLO!
I HAVE PREPARED A INVERTER CIRCUIT OF 20W USING 555 TIMER AND MOSFET(IRFZ44). THE BATTERY I AM USING IS 12V,1.3AHR.THE BULB(11W CFL) GLOW IS VERY BRIGHT WHEN I CONNECTED IN THE CIRCUIT.THE BATTERY HAS A BACKUP UP TO 35MIN.
AFTER IT GOT DISCHARGED I HAVE RECHARGED THE BATTERY FULLY AND AGAIN CONNECTED TO IN THE CIRCUIT.THE BULB DID NOT GLOW AT ALL.
THINKING THERE IS FAULT IN THE BATTERY I HAVE CONNECTED ANOTHER DC SOURCE TO THE CIRCUIT THE BULB AGAIN GLEW.

PLEASE TELL ME WHAT IS FAULT AND HOW TO REPAIR IT .ELSE
WHAT BATTERY SHOULD I USE?